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<TITLE>Re: [VoiceOps] T38 over Sip</TITLE>
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<FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>We are only experiencing problems when trying to send multi page faxes, when sending single page faxes it completes successfully.<BR>
<BR>
Please see the attached sniffer traces, they include calls with both single page and multipage faxes over T.38 with ecm disabled and the G711ulaw<BR>
<BR>
It would seem that no data is transmitted after the MPS message<BR>
<BR>
Pleasee see below the fax configuration<BR>
<BR>
<BR>
voice service voip <BR>
fax protocol t38 ls-redundancy 0 hs-redundancy 0 fallback none<BR>
sip<BR>
!<BR>
!<BR>
voice class codec 1<BR>
codec preference 1 g711ulaw<BR>
<BR>
dial-peer voice 1 voip<BR>
description sip fax test<BR>
translation-profile outgoing voip<BR>
destination-pattern 0T<BR>
voice-class codec 1<BR>
session protocol sipv2<BR>
session target ipv4:192.168.0.14<BR>
incoming called-number 0873514633<BR>
fax-relay ecm disable<BR>
fax protocol t38 nse force ls-redundancy 0 hs-redundancy 0 fallback pass-through g711ulaw<BR>
!<BR>
dial-peer voice 2 pots<BR>
tone ringback alert-no-PI<BR>
destination-pattern 0873514633<BR>
direct-inward-dial<BR>
port 6/0:D<BR>
forward-digits all<BR>
!<BR>
<BR>
<BR>
Looking at the trace I'm concerned about the t38:t30- No-signal messages<BR>
<BR>
<BR>
On 2009/08/28 6:13 PM, "Lee Riemer" <<a href="lriemer@bestline.net">lriemer@bestline.net</a>> wrote:<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'>Next time you include a capture, don't include your telnet session where we can see you log in. A simple "port 5060" when you start the capture will prevent this.<BR>
<BR>
Anyways, if you don't see something like this:<BR>
<BR>
m=image 16002 udptl t38<BR>
a=T38FaxVersion:0<BR>
a=T38FaxRateManagement:transferredTCF<BR>
a=T38FaxFillBitRemoval:0<BR>
a=T38FaxTranscodingMMR:0<BR>
a=T38FaxTranscodingJBIG:0<BR>
a=T38MaxBitRate:14400<BR>
a=T38FaxUdpEC:t38UDPFEC<BR>
a=T38FaxMaxBuffer:200<BR>
a=T38FaxMaxDatagram:72<BR>
<BR>
in the SDP section, T38 is not attempting to kick in.<BR>
<BR>
Lee Riemer - Director IP Voice<BR>
Bestline Communications, L.P.<BR>
512.328.9095 Voice<BR>
512.328.0038 Fax<BR>
<BR>
Junaid Hattia wrote: <BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> <BR>
So basically I cannot fax...attached is the wireshark trace<BR>
<BR>
<BR>
On 2009/08/28 1:29 PM, "Alex Balashov" <<a href="abalashov@evaristesys.com">abalashov@evaristesys.com</a>> <<a href="mailto:abalashov@evaristesys.com">mailto:abalashov@evaristesys.com</a>> wrote:<BR>
<BR>
<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> <BR>
There are many things that could be wrong there. Problem description is<BR>
not sufficient.<BR>
<BR>
Junaid Hattia wrote:<BR>
<BR>
<BR>
<BR>
</SPAN></FONT><BLOCKQUOTE><FONT FACE="Calibri, Verdana, Helvetica, Arial"><SPAN STYLE='font-size:11pt'> <BR>
Howdy<BR>
<BR>
Ok so im trying to t38 over sip working with no luck<BR>
<BR>
My test lab is as follows:<BR>
<BR>
Pangea box connecting to a AS5400 via PRI, which then traverses an Acme<BR>
Session director, broadsoft and then exits via PGW(SS7)<BR>
<BR>
The sniffer capture says ³failure to train²<BR>
<BR>
<BR>
Any ideas?<BR>
<BR>
--<BR>
junaid<BR>
<BR>
<BR>
<BR>
<BR>
<BR>
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